feat(voyage)!: marketplace handoff — rename plugins/ultraplan-local to plugins/voyage [skip-docs]

Session 5 of voyage-rebrand (V6). Operator-authorized cross-plugin scope.

- git mv plugins/ultraplan-local plugins/voyage (rename detected, history preserved)
- .claude-plugin/marketplace.json: voyage entry replaces ultraplan-local
- CLAUDE.md: voyage row in plugin list, voyage in design-system consumer list
- README.md: bulk rename ultra*-local commands -> trek* commands; ultraplan-local refs -> voyage; type discriminators (type: trekbrief/trekreview); session-title pattern (voyage:<command>:<slug>); v4.0.0 release-note paragraph
- plugins/voyage/.claude-plugin/plugin.json: homepage/repository URLs point to monorepo voyage path
- plugins/voyage/verify.sh: drop URL whitelist exception (no longer needed)

Closes voyage-rebrand. bash plugins/voyage/verify.sh PASS 7/7. npm test 361/361.

plugins/ultraplan-local/package.json

@@ -1,26 +0,0 @@
-{
-  "name": "voyage",
-  "version": "4.0.0",
-  "description": "Voyage — brief, research, plan, execute, review, continue. Contract-driven Claude Code pipeline.",
-  "type": "module",
-  "engines": {
-    "node": ">=18"
-  },
-  "scripts": {
-    "test": "node --test 'tests/**/*.test.mjs'",
-    "verify": "bash verify.sh"
-  },
-  "keywords": [
-    "claude-code",
-    "planning",
-    "research",
-    "agents",
-    "plugin"
-  ],
-  "author": "Kjell Tore Guttormsen",
-  "license": "MIT",
-  "repository": {
-    "type": "git",
-    "url": "https://git.fromaitochitta.com/open/ktg-plugin-marketplace"
-  }
-}